Improvement in harvesters



G. WEILAND.

'HARVBSTBR. l

Patented M81126, 1868.

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GODFRIED' WElL AND, or BUFFA1LO,.'NEW- ronmnsslo'nonro HIMSELF AND IRA R. AMSDEN, OF sn-nnrnnon.

Lam Patent'No. 78,245, dated May 26, 1868.

' IMPROVEMENT IN HARVBSTEBB.

TO ALL WHOM IT MAY oo oEnrn- Be it known that I, GODFRIEI) WEILAND, of the city of Buffalo, county of Erie, and State of New York, have invented-a certain new and improved Ratchet-Hob for Mowing-Machines; and I do hereby declare thatthe. following is a full, clchr, and exact description thereof, reference being had to the accompanying drawings, making l a part of this specification, in which- Figure I is a longitudinal section,

I Figure II is a side elevation, and

, Figure III is a front elevation.

My invention relates to the construction of a self-actingclutch-coupling, applied to thedriving-sbaft of a. mowing-machine, in order to prevent the motion of the working parts when the machine is hacked, and consistsin makingone half'of the clutch-coupling movable on a square shnnkcarried by the loose pinion or by the driving-wheel, in combination with the other half of said coupling keyed to the driving-shaft, and forniing a shell or casing which covers the first-mentioned half of the coupling, both parts being held in contact by nji'eans of a spiral spring, located; between the pinion or the hub of the driving-wheel, and the sliding part-of the y couplings,

Lctters of like name and kind refcr to like parts in cach'oftho figures.-

A represents the driving-shaft of the machineto which the half Bof the clutch eouplin'g is firmly keyed.- This part of the coupling is provided with teeth, side-ratchct, and also with a rim, a','around,said teeth, and extending beyond the sarne to thepinion,-thus forming a shelfl or casingwhich perfectly covers the movable p'art of the coupling and'the spiral spring, and protects them from dust, rain, he.

The pinion G, which receives the motiou'from the driving-wheel of the machine, andtransmits it to the driving-shaft A, runs loosely thereon. I

'A square shank, D,'is'made in one piece with the pinion G, and projects toward the coupling, and enters tho jmovablc part E of the'coupli'ng which slides thereon, and is brought in contact with the part B of the coup ling, keyed to the driving-shaft: A, by means of a spiral spring, F, which is located and expands between the i pinion C and the sliding par-t E of the coupling. Said sliding 'or movable part E of the coupling has its teeth corresponding to those of the above-mentioned part B. "In some machines the driving-wheel is applied to the driving-shaft. In this case the square shank D is caston the; hub'of the driving-wheel. i

Annular grooves c c -are.cut into'said'pinion and the movable part of'the coupling for the reception of the spiral spring F, and retaining it in place. p v l The teeth of the coupling are. formed in such a manner that, when the machine is' going forward and per forming its work, the square faces oftho teeth-on the movable part of the couplingbear against the square faces of the part of the coupling keyed to the driving-shaft, thus transmitting the motion of the driving-wheel oftho inachine by the pinion and coupling to the driving-shaft, and, further,'to those parts or devices which bring the cutting-blades or knives into operation. v

When the machine is backing, inwhicli movement it is not required to operate the cutters, the inclined planes of the teeth on the movable part'of the coupling bear against the inclined planes of the-teeth on the other part of the coupling, and the resistance of the working parts of the machine being a gooddeal stronger than the pressure of the'spiral spring, the teeth of .the movable part of the coupling slide over those in the shell B, thus moving the part E toward the pinion, and thereby pressing said spring together until the square faces of the teeth reach each other, when the spring will throw the movable part toward the stationary part, and cause their teeth to engage each other. After that the teeth of thepart E will again slide over those of the part B, as just before-described, and so on until a forward movement of the niachine begins, when they will engage and give motion to the driving-shaft.

' My improvement furnishes a coupling between the pinion and the driving-shafncr between the driving wheel and shaft, which sec'ures a perfectly safe connection between said parts, and transmits the moving power he the working perts vhen the machine is moving forward-find performing its work,.nnd yvhieh suspends by itself said connection, and leaves the working parts motionless when the machine i ba'eking and m required to' work.

. 'My improyement'further allows a long'beering to be given fo, the pinion, thereby securing the same against excessive wear and friction. I Q

, Having thus described my invention, what Ielaim, and desire to secure by Letters Patent, is-

The combination of the pinion C or 'the driving-wheel hub,'ha'ving a. square shnlnk, D,-th e movable part; E, fixed part B, with. eoveving.- rim' a, and.coiled spring F, censti uqted, arranged, and ope-puf ing in the manner and for the purpose described.

GODFBIED WEILAND.

Witnesses:

' W. H. Fonnusn, EDWARD WILHELM. 

